HtmlExportOptions options = doc.HtmlExportOptions;
options.OfficeMathOutputMode = HtmlOfficeMathOutputMode.MathML;

doc.RemoveBlankPages(); // Delete blank pages
doc.RemovePages(new List {0,1,3}); // Delete specified pages

Document doc = new Document();
doc.AddSection().AddParagraph().AppendText("wertyuiop[]fghjk");

// Add VBA project to document
VbaProject vbaProject = new VbaProject();
vbaProject.Name = "SampleVBAMacro";
doc.VbaProject = vbaProject;

// Add modules to VBA project
// Module 1
VbaModule vbaModule1 = doc.VbaProject.Modules.Add("SampleModule1", VbaModuleType.StdModule);
vbaModule1.SourceCode = @"
Sub DocumnetInfo()
    MsgBox ""create time: "" &Now()
    MsgBox ""Pages:"" & ActiveDocument.Range.ComputeStatistics(wdStatisticPages)
End Sub

Sub WriteHello()
    Selection.TypeText Text:=""Hello World!""
End Sub";

// Module 2
VbaModule vbaModule2 = doc.VbaProject.Modules.Add("SampleModule2", VbaModuleType.StdModule);
vbaModule2.SourceCode = @"
Sub InsertCurrentDate()
    Selection.TypeText Text:=Format(Now(),""yyyy-mm-dd hh:mm:ss"")
End Sub

Sub IndentParagraph()
    Selection.ParagraphFormat.LeftIndent = InchesToPoints(0.5)
End Sub";

doc.SaveToFile("result.docm", FileFormat.Docm);
doc.Close();

Document doc = new Document();
doc.LoadFromFile("input.docx");
StringBuilder sb = new StringBuilder();
RevisionInfoCollection revisionInfoCollection = doc.GetRevisionInfos();

foreach (RevisionInfo revisionInfo in revisionInfoCollection)
{
    sb.AppendLine("[author]:" + revisionInfo.Author + "\r\n" + "  [RevisionType]:" + revisionInfo.RevisionType + "\r\n" + "  [DateTime]:" + revisionInfo.DateTime.ToString() + "\r\n" + "  [OwnerObject]:" + revisionInfo.OwnerObject + "\r\n" + "  [OwnerObject.Owner]:" + revisionInfo.OwnerObject.Owner + "\r\n");
    if (revisionInfo.OwnerObject is TextRange textRange)
    {
        TextRange range = (TextRange)textRange;
        sb.AppendLine($"TextRange - Content:{range.Text}");
    }
}
File.WriteAllText(outputFile, sb.ToString());
doc.Dispose();

// Use BYROW to calculate the average of each row
sheet.Range["G2"].Formula = "=BYROW(B2:F2, LAMBDA(row, AVERAGE(row)))";
// Use BYCOL to calculate the average of each column
sheet.Range["B8"].Formula = "=BYCOL(B2:B7, LAMBDA(col, AVERAGE(col)))";

Workbook workbook = new Workbook();
workbook.LoadFromFile(inputFile);
Worksheet sheet = workbook.Worksheets[0];
CellRange cell = sheet.Range["A1:B3"];
string html = cell.HtmlString;
File.WriteAllText(outputFile, html);

CopyRangeOptions options = CopyRangeOptions.Transpose | CopyRangeOptions.All;
sheet["A1:C4"].Copy(sheet["D2:G3"], options);
sheet["A1:B5"].Copy(sheet["D5"], options);
workbook.SaveToFile(outputFile);

Workbook workbook = new Workbook();
workbook.LoadFromFile(inputFile);
workbook.ConverterSetting.PdfConformanceLevel = Spire.Xls.Pdf.PdfConformanceLevel.Pdf_UA1;
workbook.SaveToFile(outputFile, FileFormat.PDF);
workbook.Dispose();

// Simple word matching
Regex regex = new Regex(@"\bhello\b");
IAutoShape shape = (IAutoShape)ppt.Slides[0].Shapes[0];
TextHighLightingOptions options = new TextHighLightingOptions();
shape.TextFrame.HighLightRegex(regex, Color.Red, options);

// Retrieve
PdfFileInfo info = doc.FileInfo;
PdfVersion version = info.Version;

// Settings
doc.FileInfo.Version = PdfVersion.Version2_0;